getting flow failed exception

[santlal gupta]

Hi ,

I am new to cascading lingual. I have followed steps specified in the http://docs.cascading.org/lingual/1.0/ tutorial to install the lingual.

I have set Hadoop_home and hadoop_conf_dir as :

export HADOOP_HOME=/usr/lib/hadoop

export HADOOP_CONF_DIR=/etc/hadoop/conf

After installation, in .lingual/catalog i saw 

  "platformName" : "local"

 "cascading.bind.provider.text.factory.classname" : "cascading.lingual.platform.local.LocalDefaultFactory" 

  "cascading.bind.provider.text.platforms" : "local"

so i have changed it to 

"platformName" : "hadoop"

 "cascading.bind.provider.text.factory.classname" : "cascading.lingual.platform.hadoop.HadoopDefaultFactory", 

  "cascading.bind.provider.text.platforms" : "hadoop"

After this when i have entered into the lingual shell i got following exception

lingual shell --verbose

issuing: !connect jdbc:lingual:hadoop;resultSchema=results;resultPath=results;maxRows=10000 '' '' cascading.lingual.jdbc.Driver

 when i am creating select query it runs successfully. 

i.e.  0: jdbc:lingual:hadoop> select * from employees.dept_emp;

 but when i run 

0: jdbc:lingual:hadoop> select * from employees.dept_emp where EMP_NO=19050;

 i got below exception

Warning: exception while executing query: flow failed: unhandled exception: Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the correspond server addresses. (state=,code=0)

Error: exception while executing query (state=,code=0)

i checked configuration too  and found it as below 

 <property>

    <name>mapreduce.framework.name</name>

    <value>yarn</value>

  </property

Hadoop-version = Hadoop 2.6.0-cdh5.4.2

Thanks

Santlal Gupta

[Andre Kelpe]

You are using the wrong platform. For Hadoop 2.x based distributions
you have to use lingual-hadoop2mr. The easiest way is to set the
LINGUAL_PLATFORM to hadoop2-mr1 instead of hadoop.

http://docs.cascading.org/lingual/1.2/#getting-started

HTH

André

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André Kelpe
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